To achieve a long electric drive range, new battery systems with advanced high capacity cathode and anode is needed. xLi2MnO3�(1-x)LiMO2 (M = Mn, Ni) cathode offers the potential of very high energy that can meet the PHEV 40 miles.  Since this material operates at 4.6V, there is a need to stabilize the electrode-electrolyte interface to prevent surface reactivity and electrolyte oxidation at high voltage and high temperature in order to increase both cycle and calendar life. Our approach is to apply several advanced coating process that allow for coating nano film at the positive active powder or at the electrode after processing.  This coating improves significantly the life of the battery. We will also discuss another high energy cathode approach based of full gradient concentration at the particle level. In addition and in order to increase the energy density of the battery, graphene-silicon composite that offers 3 times the energy of carbon used in the conventional lithium batteries will be discussed

Advanced next generation high energy lithium battery

245th National Meeting (2013)

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